Popular music evolves as popular music evolves; there's no saying what'll happen next because it's in a state of constant flux. The Popular Tradition is healthy, although I wish Eminem would get back to telling stories rather than mithering on about his family & addictions, but the punters love it and he's still well on top of his game.

The 1954 Definition simply clarifies musical process with respect of community and tradition; I don't think it concerns the Folk Scene per se, rather the broader condition of Traditional Musics.